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Is it legal to buy phentermine without a prescription?

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It is not legal to buy phentermine without a prescription because it is a schedule IV controlled substance, according to Drugs.com. Phentermine produces amphetamine-like effects, and of all appetite suppressants, it is the most commonly prescribed and the most repeatedly encountered on the illicit market, says the Drug Enforcement Administration.

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Chronic intoxication with appetite suppressants such as phentermine causes marked insomnia, dermatoses, personality changes, hyperactivity and irritability. The person also risks developing psychosis, says Drugs.com. If someone overdoses on phentermine, he experiences tremors, restlessness, rapid respiration, hallucination and confusion. Overdosing on phentermine also causes cardiovascular symptoms such as arrhythmia, tachycardia, circulatory collapse, hypertension or hypotension, and gastrointestinal effects such as vomiting, nausea, diarrhea and abdominal cramps. A phentermine overdose also causes fatal poisoning, which triggers convulsions and coma.

Phentermine is a stimulant that is related pharmacologically and chemically to amphetamines, which are extensively abused drugs. It acts as an appetite suppressant by affecting the central nervous system. Doctors use it along with exercise and diet to remedy obesity in patients with diabetes, high blood pressure or high cholesterol, says Drugs.com. A person who abuses amphetamines and other related drugs develops severe social dysfunction and intense psychological dependence. Also, ceasing prolonged high-dosage use of these drugs triggers extreme fatigue, sleep pattern changes and mental depression.

Expectant and breast-feeding mothers should not use phentermine, cautions Drugs.com. Also patients with a history of heart disease, an overactive thyroid, severe or uncontrolled high blood pressure, a history of pulmonary hypertension, or a history of drug or alcohol abuse should avoid phentermine.

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